We prove a q-analogue of the formula $ \sum_{1\le k\le n} \binom nk(-1)^{k-1}\sum_{1\le i_1\le i_2\le... \le i_m=k}\frac1{i_1i_2... i_m} = \sum_{1\le k\le n}\frac{1}{k^m} $ by inverting a formula due to Dilcher.
On a q-analogue of the Zeta polynomial of posets
Defining the q-analogue of a matroid
A q-analogue of some binomial coefficient identities of Y. Sun
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